Support for concrete reenforcing steel



Feb. 6, 1934. E, E. WELCH SUPPORT FOR CONCRETE REENFORCING STEEL Filed Oct. 3, 1932 3 Sheets-Sheet l Inventor 277 9 Ec/waW /E W/CZ Feb. 6, 1934. E, WELCH 1,946,418

SUPPORT FOR CONCRETE REENFORCING STEEL Filed Oct. 3, 1932 3 Sheets-Sheet 2 Inventor Feb. 6, E E \NELQH SUPPORT FOR UONCRETE REENFOEU ING STEEL Filed 001; 5, 1932 3 Sheets-Sheet 3 U a w Invenior I Edward E M /LZ v flllomey Patented Feb. 6, 1934 NlTED STATES PATENT OFFICE SUPPORT FOR CONCRETE REENFORCING STEEL 1 Claim.

This invention appertains to new and useful improvements in reenforced concrete work and more particularly to a .support for reenforcing elements.

The principal object of the present invention is to provide a support for concrete reenforcing steel wherein a base is employed which will only have a small area of its surface in contact with the form so that when the form is removed practically none of the support is bare.

Another important object of the invention is to provide a support for concrete reenforcing steel wherein the support is of curved construction so that even in the event the same tilts in the form, only a small area of its surface will be in contact with the form.

Other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings:

Figure 1 represents a top plan view of one style of support base.

Fig. 2 represents a side elevational view of the structure shown in Fig. 1.

Fig. 3 represents a top plan View of another support base structure of substantially larger proportions.

Fig. 4 represents a side elevational view of the structure shown in Fig. 3.

Fig. 5 represents a top plan view of the base with the tie wires upstanding.

Fig. 6 represents a side elevational view of the structure shown in Fig. 5, this form of the invention being without the convoluted internal reenforcing means.

Fig. 7 represents a perspective view of the support in use supporting a bottom steel.

Fig. 8 represents a perspective view of the support upon which is mounted a high chair or an elevated steel.

Fig. 9 represents a vertical sectional view through the base shown in Fig. 8, showing the manner in which the tie elements are disposed prior to application of the steel or high chair thereto.

Referring to the drawings wherein like numerals designate like parts, it can be seen in Figs. 1 and 2, that the support consists of a hemispherical shaped base 5 having a fiat top surface 6 diametrically across which is a groove 7. The form of the invention shown in Figs. 3 and 4 is substantially identical with the forms shown in Figs. 1 and 2 excepting that the groove 7 shown in Fig. 4 is of less depth than the groove 7 and is for use Where the concrete layer is of a greater depth.

In both of these forms 5 and 5, a coiled reenforcing element 8 is embedded in the base when the convolutions pull apart in the manner substantially shown in dotted lines in Figs. 1 and 3.

Embedded in the bases 5 and 5' are the U- shaped tie elements 99, each being of ductile material having its bight portion embedded in the base 5 in the manner substantially shown in Fig. 9. It will be observed, that the bight portion of each of these elements is twisted to provide an ofiset 10 which obviously prevents pulling through or slipping through of the tie element from the base 5 or 5. 7

In conjunction with either the base 5 or base 5, a high chair such as is disclosed generally by numeral 11 in Fig. 8 can be employed. This high chair consists of inverted U-shaped bar 12 having its leg portions oifset horizontally with respect to each other in a. lateral direction with each leg provided with a foot portion 13, the feet being of parallel spaced relation as shown in Fig. 8 and resting upon the top surface 6 of the base 5 bridging the aforementioned chan nel or groove '7.

As is clearly shown in Fig. 8, the elevated steel 14 is tied as at 15 to the elevated bight portion 16 of the high chair 12 while the feet 13 are secured to the top surface 6 of the base 5 by adjacent ends of the tie elements 9 being disposed thereover and twisted as at 1'7.

Thus the high chair is secured to the base 5 and while it is the tendency of the base 5 to maintain a position with its surface 6 substantially horizontal, if there is any likelihood of the base 5 tilting in the form, the form being denoted by numeral 18, no increased surface area of the base will contact with the form due to the hemi-spherical shape of the base. With such a base construction, only a very slight surface area of the curved portion of the base will be exposed through the concrete after the form is removed. Thus the form will be almost entirely embedded in the concrete, thus increasing its eiiiciency and its ability to withstand greater strain without displacement from the concrete.

Fig. 7, shows the base 5 or 5 with a bottom steel 19 disposed in the groove '7 thereof and with the tie element 9 trained thereover and twisted as at 20 to secure the steel to the base and in resting position within the groove 7.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape. size spherical shaped body having its curved surface for contact with a concrete form and means on the body whereby the said body can be secured to a concrete reenforcing steel so that the reenforcing steel will lie diametrically across the fiat side of the body.

EDWARD E. WELCI-I. 

